<5. Functions>
81
IM 01E21A02-03EN
5.4 Inputting External Temperature
By using the external temperature input, external temperature can be used for temperature-base
density correction calculation and calorie calculation. For details about the temperature-input
density correction calculation and calorie calculation, refer to Subsections 5.5.5 and 5.5.6.
This function can be used by making the minimum settings, such as scheduling and connecting
the external input to IN_1 of the MAO function block.
External input temperature is set with the following parameters.
Display
Device setup ► Detailed setup ► Temperature ►(see below)
F
OUNDATION
Fieldbus
Device Configuration ► STB ► Device Configuration ► Configuration ► Process
Variables ► Temperature ► (see below)
Block
Name
Relative
Index
Parameter
Description
Display
F
OUNDATION
Fieldbus
STB
84
Function
Temp Function
Specifies as what value the
device should handle the
external temperature input
internally.
STB
85
Unit
Temp Unit
Specifies the unit of the
external temperature input.
STB
86
URV
Temp URV
Specifies the high limit of the
range value of the external
temperature input.
STB
87
LRV
Temp LRV
Specifies the low limit of the
range value of the external
temperature input.
NOTE
When the external input is connected to IN_2 - IN_8, it is not reflected.
From the table below, select the function.
Selection
Description
Display
F
OUNDATION
Fieldbus
No function
No function
Disables the external input function.
Monitoring
Monitoring
Though the external input function is enabled, it does not influence flow
rate calculation.
Diff temperature
Diff temperature
Uses the external input as temperature difference. Calorie calculation is
enabled if selected.
Ext temperature
Ext temperature
Uses the external input as temperature. The density correction
calculation and calorie calculation of mass flow rate are enabled if
selected.